package com.zzyl.nursing.service.impl;

import cn.hutool.core.util.ObjectUtil;
import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.zzyl.common.exception.base.BaseException;
import com.zzyl.nursing.service.WechatService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WechatServiceImpl implements WechatService {


    // 登录
    private static final String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session?grant_type=authorization_code";

    // 获取token
    private static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";

    // 获取手机号
    private static final String PHONE_REQUEST_URL = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=";

    @Value("${wechat.appId}")
    private String appId;

    @Value("${wechat.appSecret}")
    private String appSecret;

    /**
     * 根据code获取openid
     *
     * @param code 临时登录凭证
     * @return openid
     */
    @Override
    public String getOpenid(String code) {

        Map<String, Object> params = new HashMap<>();
        params.put("appid", appId);
        params.put("secret", appSecret);
        params.put("js_code", code);

        //  发送请求，获取openid
        String result = HttpUtil.get(REQUEST_URL, params);

        //解析结果
        JSONObject resultObj = JSONUtil.parseObj(result);
        Integer errcode = resultObj.getInt("errcode");
        if (errcode != null) {
            throw new BaseException(resultObj.getStr("errmsg"));
        }
        return resultObj.getStr("openid");
    }

    /**
     * 根据phoneCode获取手机号
     *
     * @param phoneCode 获取手机号的临时code
     * @return 手机号
     */
    @Override
    public String getPhone(String phoneCode) {
        //1. 调用微信获取token
        String token = getToken();

        //2. 通过token和phoneCode获取手机号
        Map<String, Object> params = new HashMap<>(1);
        params.put("code", phoneCode);
        String result = HttpUtil.post(PHONE_REQUEST_URL + token, JSONUtil.toJsonStr(params));
        JSONObject resultObj = JSONUtil.parseObj(result);
        if (resultObj.getInt("errcode") != 0) {
            throw new BaseException(resultObj.getStr("errmsg"));
        }
        return resultObj.getJSONObject("phone_info").getStr("phoneNumber");
    }

    private String getToken() {
        Map<String, Object> params = new HashMap<>();
        params.put("appid", appId);
        params.put("secret", appSecret);

        //调用微信获取token
        String result = HttpUtil.get(TOKEN_URL, params);
        //解析结果
        JSONObject resultObj = JSONUtil.parseObj(result);
        if (ObjectUtil.isNotEmpty(resultObj.getInt("errcode"))) {
            //获取失败
            throw new BaseException(resultObj.getStr("errmsg"));
        }

        return resultObj.getStr("access_token");
    }
}
